Hydromorphone, also known as dihydromorphinone, and sold under the brand name Dilaudid among others, is an opioid used to treat moderate to severe pain. Long term use is typically only recommended for pain due to cancer. It may be used by mouth or by injection into a vein, muscle, or under the skin. Effects generally begin within half an hour and last for up to five hours. Buprenorphine Powder, Butorphanol Powder, Codeine Powder, Hydrocodone Powder, Hydromorphone Powder, Levorphanol Powder, Meperidine Powder, Methadone Powder, Morphine Powder, Oxycodone Powder, Oxymorphone Powder are opioid agonists indicated for the relief of moderate to severe acute and chronic pain where an opioid is appropriate. Buprenorphine and methadone is also indicated for detoxification or maintenance treatment of opioid addiction.